As the mistake was accomplished by the god Indra, he grants Hanuman a want that his human body can be as robust as Indra's Vajra, Which his Vajra may not hurt him. Coupled with Indra other gods have also granted him wishes: the God Agni granted Hanuman a want that https://pressnews24daily.blogspot.com/2024/08/the-significance-of-hanuman-jayanti.html